CN113008091B - Energy-gathering buffering device and method for improving smooth blasting effect of tunnel - Google Patents
Energy-gathering buffering device and method for improving smooth blasting effect of tunnel Download PDFInfo
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- CN113008091B CN113008091B CN202110247070.7A CN202110247070A CN113008091B CN 113008091 B CN113008091 B CN 113008091B CN 202110247070 A CN202110247070 A CN 202110247070A CN 113008091 B CN113008091 B CN 113008091B
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- 238000005422 blasting Methods 0.000 title claims abstract description 41
- 230000000694 effects Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000003139 buffering effect Effects 0.000 title claims abstract description 9
- 239000002360 explosive Substances 0.000 claims abstract description 57
- 239000006260 foam Substances 0.000 claims abstract description 26
- 238000005192 partition Methods 0.000 claims abstract description 26
- 239000004744 fabric Substances 0.000 claims abstract description 19
- 238000004880 explosion Methods 0.000 claims abstract description 17
- 239000011358 absorbing material Substances 0.000 claims abstract description 15
- 239000003063 flame retardant Substances 0.000 claims abstract description 14
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011435 rock Substances 0.000 claims abstract description 10
- 238000009412 basement excavation Methods 0.000 claims abstract description 7
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 15
- 239000011496 polyurethane foam Substances 0.000 claims description 15
- 239000003365 glass fiber Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 238000005474 detonation Methods 0.000 description 2
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- 230000000903 blocking effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/18—Plugs for boreholes
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to an energy-gathering buffering device for improving smooth blasting effect of a tunnel, which comprises a plurality of detachably connected PVC outer pipes and partition plates arranged in the PVC outer pipes, wherein the partition plates are used for resisting and guiding energy during blasting, the partition plates are used for spacing the inner walls of the PVC outer pipes along the circumferential direction to form an energy-absorbing material part and an explosive part, the central angle corresponding to the energy-absorbing material part is smaller than the central angle corresponding to the explosive part, the explosive part is used for installing explosive rolls, energy-absorbing foam is arranged in the energy-absorbing material part and used for reducing disturbance and damage to surrounding rocks outside an excavation contour line during blasting, and flame-retardant cloth is attached to the outer sides of the energy-absorbing foam. The invention can make adaptive change on the volumes of the energy absorption material part and the explosive part through the arrangement of the partition plate so as to adapt to cartridges with different sizes for installation, thereby meeting the field environment with different surrounding rock qualities. The energy-absorbing foam can absorb energy of the explosion energy which cannot be blocked, and the partition board can reflect the energy generated in the explosion process, so that the energy generated in the explosion process is effectively guided.
Description
Technical Field
The invention relates to the technical field of blasting devices, in particular to an energy-gathering buffering device for improving a smooth blasting effect of a tunnel.
Background
Smooth blasting is one type of tunnel controlled blasting. The surrounding holes are blasted after the rock mass in the designed tunnel section is blasted and collapsed, so that the profile of the blasted tunnel section is neat, and the disturbance and the damage of the blasting to surrounding rocks are reduced to the maximum extent. Smooth blasting requires that the explosive is charged without coupling, namely the diameter of the explosive is smaller than that of a blast hole, and a gap is reserved between the explosive and the wall of the blast hole. In the prior art, the contact gap between the explosive column and the blasthole is large at the top and small at the bottom, the detonation waves are transmitted unevenly in the blasthole, the blasting directivity is not strong, the disturbance to surrounding rocks cannot be reduced fundamentally, and the excavation contour line is difficult to achieve without exceeding or not being insufficient.
Therefore, how to provide an energy-gathering buffer device and method for improving the smooth blasting effect of the tunnel so as to improve the stability of the tunnel. Is a technical problem which needs to be solved at present by the technical personnel in the field. In view of the above problems, the present designer is based on the practical experience and professional knowledge that are abundant for many years in engineering application of such products, and combines with the application of theory to actively make research and innovation, so as to create an energy-gathering buffer device and method for improving the smooth blasting effect of the tunnel, and make it more practical.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to provide an energy-gathering buffer device and method for improving the smooth blasting effect of a tunnel so as to improve the stability of the tunnel.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an it can buffer to gather for improving tunnel plain blasting effect, is in including a plurality of PVC outer tubes that can dismantle the connection and setting baffle in the PVC outer tube, the baffle is used for hindering the energy when blasting can and the direction, the baffle will form energy-absorbing material portion and explosive portion along the spaced apart formation of circumference direction on the PVC outer tube inner wall, the central angle that energy-absorbing material portion corresponds is less than the central angle that explosive portion corresponds, explosive portion is used for installing the cartridge, install the energy-absorbing foam in the energy-absorbing material portion for to opening the disturbance and the damage of digging the outer country rock of outline line outside when reducing the explosion, the energy-absorbing foam outside is attached to have fire-retardant cloth.
Furthermore, at least three groups of pre-splitting hole groups are arranged on the PVC outer pipe at intervals along the circumferential direction, and the pre-splitting hole groups are arranged on the outer side of the explosive part and used for reducing the loss of explosive blasting power on the outer side of the explosive part.
Further, each pre-splitting hole group comprises a plurality of through holes arranged along the axial direction, the through holes are communicated with the explosive part, and the section of each through hole is rectangular.
Furthermore, each pre-splitting hole group comprises a groove arranged along the axial direction, the length of the opening depth of the groove along the radial direction is smaller than the wall thickness of the PVC outer pipe, and the groove extends from an opening at one end of the PVC outer pipe to an opening at the other end of the PVC outer pipe.
Furthermore, the section of the groove is in a trapezoid shape with the inner side face of the groove as a side edge, the two side edges of the trapezoid are mutually parallel, the upper bottom of the trapezoid is arranged on the side close to the explosive part, and the lower bottom of the trapezoid is arranged on the side far away from the explosive part.
Furthermore, a through preformed groove is formed in the position of the center of the circle of the energy-absorbing foam along the axial direction, the flame-retardant cloth is tightly attached to the inner groove surface of the preformed groove, and the flame-retardant cloth and the partition plate are enclosed to form a preformed hole which penetrates through the PVC outer pipe in the length direction and is used for the detonating tube to penetrate through.
Furthermore, the one end of PVC outer tube is provided with first connecting piece, and the other end is provided with the second connecting piece, first connecting piece with the second connecting piece joint is connected.
Furthermore, the first connecting piece protrudes from a first boss circumferentially arranged on the wall of the PVC outer pipe, an insertion groove is formed in one side, close to the pipe orifice of the PVC outer pipe, of the first boss, a connection groove is formed in the first boss, the insertion groove is communicated with the interior of the PVC outer pipe through the connection groove, the second connecting piece protrudes from the PVC outer pipe, the second connecting piece comprises a second boss correspondingly arranged in the insertion groove, a clamping groove is formed in the direction of the axis of the PVC outer pipe towards the second boss, a clamping piece is elastically connected in the clamping groove, and the clamping piece corresponds to the connection groove.
Furthermore, a through dismounting hole is formed in the wall of the PVC outer pipe, the dismounting hole and the connecting groove are arranged oppositely, and the number of the dismounting holes is consistent with that of the connecting grooves.
Further, the method for blasting the energy-gathering buffer device for improving the smooth blasting effect of the tunnel comprises the following steps of:
firstly, chiseling blast holes along the excavation contour line of a tunnel, cutting polyurethane foam on a construction site, covering the polyurethane foam with glass fiber cloth, installing explosive cartridges and polyurethane foam with the sizes corresponding to the PVC outer pipe in the PVC outer pipe and a partition board which are prefabricated and assembled in a factory, and connecting the explosive cartridges and the polyurethane foam with explosion transfer and initiation equipment.
Step two, using a PVC pipe slightly smaller than the diameter of the blast hole to test whether the blast hole collapses, clamps or detects whether foreign matters exist in the blast hole; and if so, processing the blasthole, otherwise, entering the step three.
And step three, plugging the single PVC outer pipes into the blastholes of the peripheral holes one by one, and then connecting the plurality of PVC outer pipes.
Inserting the detonating tube into the reserved hole, and if the blast hole collapses, using a flat-head screwdriver to penetrate through the dismounting hole to press out the clamping piece and dismounting the PVC outer tubes one by one to clear the hole or drill the hole again; and if no blast hole collapse exists, switching to the fifth step.
And step five, using special stemming to plug the blast hole and blasting.
The invention has the beneficial effects that:
the invention can make adaptive change on the volumes of the energy absorption material part and the explosive part through the arrangement of the partition plate so as to adapt to cartridges with different sizes for installation, thereby meeting the field environment with different surrounding rock qualities. The invention can ensure that the PVC pipe is lengthened section by section and centered in the blast hole through the arrangement of the connecting piece at the pipe end. The energy-absorbing foam can absorb energy of the explosion energy which cannot be blocked, the partition plate can reflect the energy generated in the explosion process, the energy generated in the explosion process is effectively guided, meanwhile, the explosive roll and the energy-absorbing foam are separated by the partition plate, the explosive roll and the energy-absorbing foam are effectively prevented from being mixed, and the stability and the practicability of the explosive-absorbing foam are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a cross-sectional view of a cumulative energy buffer device for improving the smooth blasting effect of a tunnel according to the present invention.
FIG. 2 is a schematic connection diagram of a PVC outer pipe according to an embodiment of the present invention.
FIG. 3 is a schematic view of the PVC outer pipe according to the embodiment of the present invention when it is disassembled.
FIG. 4 is a schematic representation of the attachment of an energy absorbing foam to a flame retardant cloth in an embodiment of the invention.
FIG. 5 is a cross-sectional view showing the connection of the PVC outer pipe according to the embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a trench in an embodiment of the invention.
Fig. 7 is an enlarged view of the second connector at a in fig. 2.
Reference numerals: 1. a PVC outer tube; 2. a partition plate; 3. an energy absorbing material portion; 4. an explosive section; 5. medicated rolls; 6. an energy absorbing foam; 7. flame-retardant cloth; 11. a through hole; 13. a first connecting member; 14. a second connecting member; 16. a trench; 131. a first boss; 132. inserting grooves; 133. connecting grooves; 141. a second boss; 142. a clamping piece; 12. disassembling the hole; 15. holes are reserved.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. This embodiment is written in a progressive manner.
The energy-gathering buffering device for improving the smooth blasting effect of the tunnel comprises a plurality of PVC outer pipes 1 which are detachably connected and partition plates 2 arranged in the PVC outer pipes 1, wherein the partition plates 2 are used for blocking and guiding energy during blasting, the partition plates 2 are used for spacing the inner walls of the PVC outer pipes 1 along the circumferential direction to form energy-absorbing material portions 3 and explosive portions 4, the central angles corresponding to the energy-absorbing material portions 3 are smaller than the central angles corresponding to the explosive portions 4, the explosive portions 4 are used for mounting explosive rolls 5, energy-absorbing foams 6 are mounted in the energy-absorbing material portions 3 and used for reducing disturbance and damage of surrounding rocks outside an excavation contour line during blasting, and flame-retardant cloth 7 is attached to the outer sides of the energy-absorbing foams 6.
Specifically, energy-absorbing foam 6 is polyurethane foam, and fire-retardant cloth 7 is glass fiber cloth, and glass fiber cloth plays fire-retardant effect, and polyurethane foam plays the energy-absorbing effect, and glass fiber cloth passes through glue and bonds around polyurethane foam. According to the invention, the volume of the energy absorption material part 3 and the volume of the explosive part 4 can be changed adaptively through the arrangement of the partition plate 2, so that the explosive cartridge is adapted to cartridges 5 with different sizes for installation, and the field environment with different surrounding rock qualities is met. Because the flexibility of the PVC outer pipe 1 is large, the PVC outer pipe 1 with large rotation flexibility is easy to be integrally twisted in the installation and centering process, and the length of each section of the PVC outer pipe 1 is not more than 2 m. According to the invention, the energy-absorbing foam 6 can absorb energy of the explosion energy which cannot be blocked, the partition plate 2 can reflect the energy generated during explosion to effectively guide the energy generated during explosion, and meanwhile, the partition plate 2 separates the explosive roll 5 from the energy-absorbing foam 6 to effectively prevent the explosive roll and the energy-absorbing foam 6 from being mixed, so that the stability and the practicability of the invention are improved. In the embodiment, the central angle corresponding to the energy absorbing material part 3 is not more than 120 degrees, and the central angle corresponding to the explosive part 4 is not less than 240 degrees.
Preferably, in the above embodiment, the PVC outer pipe 1 is provided with at least three sets of pre-split hole groups spaced in the circumferential direction, and the pre-split hole groups are provided outside the explosive part 4 to reduce the loss of explosive power outside the explosive part 4.
Preferably, each pre-split hole set comprises a plurality of through holes 11 arranged along the axial direction, the through holes 11 are communicated with the explosive part 4, and the cross section of each through hole 11 is rectangular. In this embodiment, the length of the through hole 11 is set to 5-8 mm, and the width is set to 1-2 mm. The loss of explosive blasting power outside explosive portion 4 can be reduced through the setting of through hole 11, and through hole 11 leads for the blasting simultaneously, and through hole 11's setting still provides the observation hole for the spaced charging.
Preferably, each set of pre-splitting holes comprises a groove 16 arranged along the axial direction, the opening depth length of the groove 16 along the radial direction is smaller than the wall thickness of the PVC outer pipe 1, and the groove 16 extends from one end opening of the PVC outer pipe 1 to the other end opening of the PVC outer pipe 1. The cross section of the groove 16 is in a trapezoidal shape with the inner side surface of the groove 16 as the side edge, two side edges of the trapezoid are mutually parallel, the upper bottom of the trapezoid is arranged at one side close to the explosive part 4, and the lower bottom of the trapezoid is arranged at one side far away from the explosive part 4. The cross-section of the groove 16 may also be arranged to be rectangular. According to the invention, the pipe wall of the PVC outer pipe 1 can be rapidly cracked through the arrangement of the trapezoidal grooves 16, so that the blasting effect is improved.
For the optimization of the embodiment, the center of a circle of the energy-absorbing foam 6 is provided with a through preformed groove along the axial direction, the flame-retardant cloth 7 is tightly attached to the inner groove surface of the preformed groove, and the flame-retardant cloth 7 and the partition plate 2 are enclosed to form a preformed hole 15 which penetrates along the length direction of the PVC outer pipe 1 and is used for the detonating tube to penetrate through. The preformed hole 15 leads the detonating tube to the tube tail of the PVC outer tube 1 from the tube orifice and then penetrates into the preformed hole 15 of the next section of PVC outer tube 1.
Preferably, one end of the PVC outer tube 1 is provided with a first connector 13, the other end is provided with a second connector 14, and the first connector 13 is connected with the second connector 14 in a clamping manner. One end of the PVC outer pipe 1 is provided with a first connecting piece 13, the other end is provided with a second connecting piece 14, and the first connecting piece 13 is connected with the second connecting piece 14 in a clamping mode.
Preferably, as for the above embodiment, the first connecting part 13 protrudes from the first boss 131 circumferentially arranged on the tube wall of the PVC outer tube 1, the insertion groove 132 is formed on one side of the first boss 131 close to the tube opening of the PVC outer tube 1, the connecting groove 133 is formed on the first boss 131, the insertion groove 132 is communicated with the inside of the PVC outer tube 1 through the connecting groove 133, the second connecting part 14 protrudes from the PVC outer tube 1, the second connecting part 14 includes the second boss 141 correspondingly arranged with the insertion groove 132, the second boss 141 is provided with the clamping groove in the direction of the axis of the PVC outer tube 1, the clamping groove is elastically connected with the clamping part 142, the clamping part 142 is correspondingly arranged with the connecting groove 133, the side of the clamping part 142 facing the axis of the PVC outer tube 1 is an arc surface, the clamping part 142 is conveniently inserted into the connecting groove 133, and convenience in field installation is improved.
In the above embodiment, the wall of the PVC outer tube 1 is preferably provided with the through-holes 12, the holes 12 are disposed opposite to the connecting grooves 133, and the number of the holes 12 is equal to the number of the connecting grooves 133. The extension length of the baffle plate 2 is less than that of the PVC outer pipe 1, and the distance from the baffle plate 2 to the two ends of the PVC outer pipe 1 is greater than that from the dismounting hole 12 to the two ends of the PVC outer pipe 1. The invention is convenient for inserting a screwdriver into the dismounting hole 12 through the arrangement of the dismounting hole 12, so that the first connecting piece 13 and the second connecting piece 14 are separated, and the PVC outer pipe 1 is dismounted.
As a preferred embodiment of the above embodiment, a method for blasting by using an energy-gathering buffer device for improving the smooth blasting effect of a tunnel comprises the following steps: firstly, chiseling blast holes along the excavation contour line of a tunnel, cutting polyurethane foam on a construction site, covering the polyurethane foam with glass fiber cloth, installing explosive cartridges 5 with the size corresponding to that of a PVC outer pipe 1 and the polyurethane foam in a PVC outer pipe 1 and a partition plate 2 which are prefabricated and assembled in a factory, and connecting the explosive cartridges and the polyurethane foam with detonation transfer and initiation equipment.
Step two, using a PVC outer pipe 1 slightly smaller than the diameter of the blasthole to test whether the blasthole collapses, clamps the pipe or detects whether impurities exist in the blasthole; and if so, processing the blasthole, otherwise, entering the step three.
Step three, plugging the single sections of PVC outer pipes 1 into the blastholes of the peripheral holes one by one, and then connecting the PVC outer pipes 1.
Inserting the detonating tube into the reserved hole 15, and if the blasthole collapses, using a flat screwdriver to penetrate through the dismounting hole 12 to press out the clamping piece 142 and dismounting the PVC outer tubes 1 one by one to clear or drill holes again; and if no blast hole collapse exists, switching to the fifth step.
And step five, using special stemming to plug the blast hole and blasting.
In the third step, when the PVC outer pipe 1 is plugged into the hole, the rotation is possible, the side of the energy-absorbing material is required to be ensured to be close to the excavation contour line all the time, and the trend of the blasting energy is ensured to ensure the blasting effect.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides an it gathers can buffer for improving tunnel smooth blasting effect which characterized in that: the explosion-proof energy-absorbing device comprises a plurality of detachably connected PVC outer pipes (1) and partition plates (2) arranged in the PVC outer pipes (1), wherein the partition plates (2) are used for resisting and guiding energy during explosion, the partition plates (2) are used for spacing the inner walls of the PVC outer pipes (1) along the circumferential direction to form energy-absorbing material parts (3) and explosive parts (4), the central angles corresponding to the energy-absorbing material parts (3) are smaller than the central angles corresponding to the explosive parts (4), the explosive parts (4) are used for installing explosive rolls (5), energy-absorbing foams (6) are installed in the energy-absorbing material parts (3) and used for reducing disturbance and damage of surrounding rocks outside an opposite-opening contour line during explosion, and flame-retardant cloth (7) is attached to the outer sides of the energy-absorbing foams (6);
the energy-absorbing foam (6) can absorb energy of the explosion energy which cannot be blocked, the partition plate (2) can reflect the energy generated in explosion, the energy generated in explosion is effectively guided, and meanwhile, the explosive roll (5) and the energy-absorbing foam (6) are separated by the partition plate (2), so that the explosive roll and the energy-absorbing foam (6) are effectively prevented from being mixed;
at least three groups of pre-splitting hole groups are arranged on the PVC outer pipe (1) at intervals along the circumferential direction, and the pre-splitting hole groups are arranged on the outer side of the explosive part (4) and used for reducing the loss of explosive blasting power on the outer side of the explosive part (4);
each pre-split hole group comprises a plurality of through holes (11) arranged along the axial direction, the through holes (11) are communicated with the explosive part (4), and the cross sections of the through holes (11) are rectangular;
each pre-splitting hole group comprises a groove (16) which is axially arranged, the opening depth of the groove (16) in the radial direction is smaller than the wall thickness of the PVC outer pipe (1), and the groove (16) extends from an opening at one end of the PVC outer pipe (1) to an opening at the other end of the PVC outer pipe (1);
the section of the groove (16) is in a trapezoid shape with the inner side surface of the groove (16) as a side edge, the two side edges of the trapezoid are not parallel to each other, the upper bottom of the trapezoid is arranged on the side close to the explosive part (4), and the lower bottom of the trapezoid is arranged on the side far away from the explosive part (4).
2. The energy concentrating and buffering device for improving smooth blasting effect of tunnel according to claim 1, wherein: the energy-absorbing foam (6) is characterized in that a through preformed groove is formed in the circle center angle of the energy-absorbing foam (6) along the axial direction, the flame-retardant cloth (7) is tightly attached to the inner groove surface of the preformed groove, the flame-retardant cloth (7) and the partition plate (2) are enclosed to form a preformed hole (15) which penetrates through the PVC outer pipe (1) in the length direction, and the preformed hole is used for the detonating tube to penetrate through.
3. The energy concentrating and buffering device for improving smooth blasting effect of tunnel according to claim 2, wherein: one end of the PVC outer pipe (1) is provided with a first connecting piece (13), the other end of the PVC outer pipe is provided with a second connecting piece (14), and the first connecting piece (13) is connected with the second connecting piece (14) in a clamping mode.
4. The energy concentrating and buffering device for improving smooth blasting effect of tunnel according to claim 3, wherein: the PVC pipe joint is characterized in that the first connecting piece (13) protrudes out of the first boss (131) arranged on the circumferential direction of the pipe wall of the PVC outer pipe (1), the first boss (131) is close to one side of the pipe orifice of the PVC outer pipe (1), the first boss (131) is provided with the connecting groove (133), the connecting groove (132) is communicated with the connecting groove (133) inside the PVC outer pipe (1), the second connecting piece (14) protrudes out of the PVC outer pipe (1), the second connecting piece (14) comprises a second boss (141) correspondingly arranged with the connecting groove (132), the second boss (141) faces towards the direction of the axis of the PVC outer pipe (1), the connecting groove is formed in the connecting groove, the connecting groove is elastically connected with a connecting piece (142), and the connecting piece (142) is correspondingly arranged with the connecting groove (133).
5. The energy concentrating and buffering device for improving smooth blasting effect of tunnel according to claim 4, wherein: the PVC pipe is characterized in that a through dismounting hole (12) is formed in the wall of the PVC outer pipe (1), the dismounting hole (12) and the connecting groove (133) are oppositely arranged, and the number of the dismounting holes (12) is consistent with that of the connecting groove (133).
6. A method of blasting with a shaped energy buffer according to claim 5 for enhancing the effect of a tunnel smoothwall blast, comprising the steps of:
chiseling blast holes along the excavation contour line of a tunnel, cutting polyurethane foam on a construction site, covering the polyurethane foam with glass fiber cloth, installing explosive cartridges (5) with the size corresponding to that of a PVC outer pipe (1) and the polyurethane foam in a PVC outer pipe (1) and a partition plate (2) which are prefabricated and assembled in a factory, and connecting the explosive cartridges and the polyurethane foam with explosion transfer and initiation equipment;
step two, using a PVC pipe slightly smaller than the diameter of the blasthole to test whether the blasthole collapses or whether foreign matters exist in a pipe clamp or the blasthole; if yes, processing the blast hole, otherwise, entering the step three;
step three, plugging single sections of PVC outer pipes (1) into the blastholes of the peripheral holes one by one, and then connecting a plurality of PVC outer pipes (1);
inserting the detonating tube into the reserved hole (15), and if a hole is collapsed in a blast hole, using a flat screwdriver to penetrate through the disassembly hole (12) to press out the clamping piece (142) and disassembling the PVC outer tubes (1) one by one to clear the hole or drill the hole again; if no blast hole collapse exists, turning to the fifth step;
and step five, using special stemming to plug the blast hole and blasting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110247070.7A CN113008091B (en) | 2021-03-05 | 2021-03-05 | Energy-gathering buffering device and method for improving smooth blasting effect of tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110247070.7A CN113008091B (en) | 2021-03-05 | 2021-03-05 | Energy-gathering buffering device and method for improving smooth blasting effect of tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113008091A CN113008091A (en) | 2021-06-22 |
| CN113008091B true CN113008091B (en) | 2022-03-08 |
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| CN202110247070.7A Active CN113008091B (en) | 2021-03-05 | 2021-03-05 | Energy-gathering buffering device and method for improving smooth blasting effect of tunnel |
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| CN2316625Y (en) * | 1997-05-23 | 1999-04-28 | 崔彪 | High-efficient blasting cleavage controlling tube |
| CN2784865Y (en) * | 2004-09-30 | 2006-05-31 | 山东招金集团蚕庄金矿 | Smooth blasting cartridge |
| CN102893119A (en) * | 2010-02-03 | 2013-01-23 | 简-阿克.本特森 | Rock blasting cartridge and ignition detonator |
| CN104482813A (en) * | 2014-11-17 | 2015-04-01 | 中国矿业大学 | All-dimensional oriented blasting charge guide rail device and method thereof |
| CN208282700U (en) * | 2018-06-06 | 2018-12-25 | 西安建筑科技大学 | Reduce the device of rock convergence measure in a kind of photoface exploision |
| CN110926293A (en) * | 2019-12-06 | 2020-03-27 | 何满潮 | Instant cracking device capable of crushing one surface and completing one surface |
| CN111197950A (en) * | 2020-02-27 | 2020-05-26 | 安徽理工大学 | Wave-blocking energy-dissipating based damage effect reduction blasting method |
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2021
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| US5649638A (en) * | 1994-05-25 | 1997-07-22 | Giat Industries | Device enabling two containers to be joined with each other and container having such a device |
| CN2316625Y (en) * | 1997-05-23 | 1999-04-28 | 崔彪 | High-efficient blasting cleavage controlling tube |
| CN2784865Y (en) * | 2004-09-30 | 2006-05-31 | 山东招金集团蚕庄金矿 | Smooth blasting cartridge |
| CN102893119A (en) * | 2010-02-03 | 2013-01-23 | 简-阿克.本特森 | Rock blasting cartridge and ignition detonator |
| CN104482813A (en) * | 2014-11-17 | 2015-04-01 | 中国矿业大学 | All-dimensional oriented blasting charge guide rail device and method thereof |
| CN208282700U (en) * | 2018-06-06 | 2018-12-25 | 西安建筑科技大学 | Reduce the device of rock convergence measure in a kind of photoface exploision |
| CN110926293A (en) * | 2019-12-06 | 2020-03-27 | 何满潮 | Instant cracking device capable of crushing one surface and completing one surface |
| CN111197950A (en) * | 2020-02-27 | 2020-05-26 | 安徽理工大学 | Wave-blocking energy-dissipating based damage effect reduction blasting method |
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| CN113008091A (en) | 2021-06-22 |
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